Subject: predatory fly
Location: Cardiff-by-the-Sea, CA
July 26, 2015 4:20 pm
Saw this fly in a neighbor’s dead bamboo. I got a look at it through binoculars, and it reminded me of deer flies I’ve seen in NorCal and So. OR, but those don’t live here, nor do they take other flies as prey. The first photo is a nice clear shot from underneath, and you can see the wings of the prey sticking out. In the, second, rather blurry photo (just could *not* get the camera to focus on anything but those intervening twigs), you can kind-of make out the relative position and size of the two. The predator was an inch (or so) long, and I’ve never knowingly seen another one in my 50+ years in this area.
Signature: Eric Simpson
This predator is a Robber Fly, and though the image is not the best for identification purposes, we suspect it is a Bee Killer, Mallophora fautrix, the only member of the genus found in California. These large Robber Flies are impressive and very adept hunters.